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油气化探数据库系统 被引量:1
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作者 赵跃伟 汤玉平 +1 位作者 李沙园 任春 《物探与化探》 CAS CSCD 2005年第1期53-56,共4页
建立油气化探数据库是油气化探信息资源共享、科学管理、宏观决策的基础和依据,是油气化探数据处理及异常评价的基础。本系统采用动态自适应结构,收集、录入了几十年来我国油气化探数据,可以完成油气化探数据登录、管理、浏览、检索、... 建立油气化探数据库是油气化探信息资源共享、科学管理、宏观决策的基础和依据,是油气化探数据处理及异常评价的基础。本系统采用动态自适应结构,收集、录入了几十年来我国油气化探数据,可以完成油气化探数据登录、管理、浏览、检索、报表、数据预处理。文章中论述了油气化探数据库的结构、特点及功能,反映了油气化探数据库研究领域的新进展和研究水平。 展开更多
关键词 数据库 油气化探 动态自适应结构
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SYSTEM IDENTIFICATION OF ADAPTIVE TRUSS STRUCTURES USING PIEZOELECTRIC ACTIVE MEMBERS
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作者 李俊宝 刘华 张令弥 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1995年第2期122-128,共7页
Adaptive truss structures are a new kind of structures with integrated active members,whose dynamic characteristies can be beneficially modified to meet mission requirements.Active members containing actuating and sen... Adaptive truss structures are a new kind of structures with integrated active members,whose dynamic characteristies can be beneficially modified to meet mission requirements.Active members containing actuating and sensing units are the major components of adaptive truss structures.Modeling of adaptive truss structures is a key step to analyze the structural dynamic characteristics.A new experimental modal analysis approach,in which active members are used as excitatiDn sources for modal test,has been proposed in this paper.The excitation forces generated by the active members, which are different from the excitation forces exerted on structures in the conventional modal test,are internal forces for the truss structures.The relation between internal excitation forces and external forces is revealed such that the traditional identification method can be adopted to obtain modal parameters of adaptive structures.Placement problem of the active member in adaptive truss structures is also discussed in this work. Modal test and analysis are conducted with a planar adaptive truss structure by using piezoelectric active members in order to verify the feasibility and effectiveness of the proposed method. 展开更多
关键词 systems identification vibrations piezoelectric materials active member adaptive truss structure modal test
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